<template>
  <div id="app">
    <el-container>
      <el-header>
        <header-bar/>
      </el-header>
      <el-main>
        <router-view/>
      </el-main>
    </el-container>
  </div>
</template>
<script>
import HeaderBar from "@/views/header/HeaderBar";

export default {
  name: 'app',
  components: {HeaderBar},
  data() {
    return {}
  },
  created() {
    //在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem("store")) {
      this.$store.replaceState(Object.assign({}, this.$store.state, JSON.parse(sessionStorage.getItem("store"))))
    }

    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload", () => {
      sessionStorage.setItem("store", JSON.stringify(this.$store.state))
    })
  }
}
</script>
<style lang="less">
@import "~@/assets/css/base.css";

.el-header {
  padding: 0;
}

#app {
  height: 100%;
}

.el-main {
  padding: 0 5px;
  height: 100%;
}

</style>
